Eternity buyer to 0, crunch (theoretically best to worst) 2e308, 1e154,1e103, 1e77 (all with "x times last" setting)
Test which works the best for you. You might have to adjust the value a little bit. Use ID+active path.
Experiment with DimBoost and Galaxy intervals a bit. I used 0.3 seconds on DimBoosts and 0.1 seconds on Galaxies, which got me the "Eternities are the new Infinity" achievement for 2x faster eternity grinding.
If you have TS181, do not use your crunch autobuyer (disable it). All other advice remains the same.